The invention discloses a thifluzamide-containing sterilization composition, and belongs to the technical field of pesticides. The sterilization composition comprises a raw pesticide prepared by compounding a bactericide A and a bactericide B with a ratio of 1-80:1-80; the bactericide A is thifluzamide; and the bactericide B is any one of the following bactericides: a copper preparation, methoxy acrylates, triazoles, amides, benzimidazoles, thiocarbamates, substituted benzenes, pyrroles, dicarboximides, phthalimides, imidazoles, morpholines, carbamates, oxazoles, antibiotics, and the like. The sterilization composition comprises the raw pesticide prepared by compounding a bactericide A and a bactericide B, the sterilization spectrum is expanded, the pesticide resistance of pathogens is alleviated, and the sterilization composition has obvious continuous synergic effect.